Indeterminate atypia in urinary tract cytology: Does it really matter?

Area of Science:

• Uropathology
• Cytopathology
• Oncology

Background:

• Urinary cytology atypia has been studied for decades, but research often overlooks patient-specific factors influencing test accuracy.
• Existing studies frequently limit follow-up periods or focus solely on concurrent biopsies, potentially skewing performance metrics.

Purpose of the Study:

• To review the diagnosis of atypia in urinary cytology.
• To evaluate the impact of atypical urinary cytology diagnoses in diverse clinical scenarios.
• To inform urologists on optimal patient management strategies for atypical findings.

Main Methods:

• Literature review of studies on urinary cytology atypia.
• Analysis of diagnostic performance considering patient factors and clinical context.
• Evaluation of The Paris System for Reporting Urinary Cytology's impact on atypical diagnoses.

Main Results:

• Malignancy diagnoses in urinary cytology generally have high positive predictive value.
• Atypical diagnoses present diagnostic uncertainty, particularly in patients with a history of bladder cancer undergoing surveillance.
• Urine cytology's sensitivity limitations mean negative results rarely obviate the need for cystoscopy.

Conclusions:

• The Paris System has enhanced the predictive value of atypical urinary cytology diagnoses.
• Further research is necessary to clarify the performance of atypical diagnoses in specific clinical situations.
• Improved understanding of atypical diagnoses will aid urologists in patient management and clinical decision-making.